<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        var arr = [2, 24, 5436, 52, 2456, 587, 6868];
        var max = arr[0];
        for (var i = 0; i < arr.length; i++){
            if(arr[i] > max){
                max = arr[i];
            }
        }
        console.log(max);
    </script>
</body>
</html>